Testing for Rotational Moulding (RM) and Service Capabilities of - - PowerPoint PPT Presentation

BITS Pilani

K K Birla Goa Campus

Testing for Rotational Moulding (RM) and Service Capabilities of BITS

• Dr. Sachin Waigaonkar

BITS Pilani, K K Birla Goa Campus

• About BITS Pilani
• Different Quality Tests in Rotational Moulding
• Service Capabilities for Rotational Moulding

Industry.

• Conclusions

Outline

BITS Pilani, K K Birla Goa Campus

BITS Pilani-Four Accredited Campuses

Pilani Campus (1964) Goa Campus(2004) Hyderabad Campus(2008) Dubai Campus (2000)

BITS Pilani, K K Birla Goa Campus

Theory learnt in classroom Practice in Industry Committed to University – Industry Collaboration Since its inception (1964) As on today, Collaboration with 300+ industries

University – Industry Linkage

Practice School Programmes

BITS Pilani, K K Birla Goa Campus

Work-Integrated Learning and Collaborative Programmes

University – Industry Linkage

[20,000 students on roll | 30,000 students graduated] 33 Organizations | 24 Degree Programmes

BITS Pilani, K K Birla Goa Campus

• Testing of Raw Materials:
• Testing of Pellets and
• Testing of Powder
• Testing of Product.( Fit, Form and Function)
• Long Term Testing of RM Products.
• Advanced Tests for Material Development

T esting in Rotational Moulding

BITS Pilani, K K Birla Goa Campus

• Density
• Melt Flow Index (MFI)
• Shape, Size Colour of Pellets
• Tensile Strength / Modulus
• Flexural Modulus
• Heat Distortion Temperature (HDT)
• Environmental

Stress Cracking Resistance (ESCR)

T esting of Raw Material (Pellets):

BITS Pilani, K K Birla Goa Campus

• Dry Flow Test
• Bulk Density Test
• Sieve Analysis - Particle Size Distribution
• Microscopic View for Characterization of

Powder.

Powder Characterization

BITS Pilani, K K Birla Goa Campus

• Dimensions of Product
• Profile
• Angularity
• Depth
• Wall Thickness Distribution
• Shrinkage and Warpage

T esting of form features of the product:

BITS Pilani, K K Birla Goa Campus

• Density of part
• Tensile Strength and Modulus
• Flexural Strength and Modulus
• Low Temperature Impact Strength
• HDT
• ESCR
• Gel Cure Test (XLPE), etc.

Mechanical Properties of the product:

BITS Pilani, K K Birla Goa Campus

• Colour Testing in Light booth
• Weatherability using Xenon Arc Lamp
• Differential Scanning Calorimetry (DSC)
• Dynamic Mechanical Testing Creep Testing using DMA
• Thermal Gravimetric Analysis (TGA)
• Scanning Electron Microscopy (SEM)
• Compounding Studies using Torque Rheometer.
• Rheological Studies using Parallel Plate rheometry

A few important tests are discussed here

Long T erm and Advanced T esting

BITS Pilani, K K Birla Goa Campus

• The specific gravity or density is a property

measured to:

• Identify a material,
• Follow physical changes in a sample,
• Indicate degree of uniformity among different

sampling units or specimens.

• To calculate strength-weight and cost-weight ratios.

Density

BITS Pilani, K K Birla Goa Campus

Effect of Density on Different Properties #

Density Property

• Tensile Strength
• HDT
• Stiffness
• Shrinkage
• Hardness
• Barrier

Properties

• Chemical

Resistance

• Impact

Strength

• ESCR
• Optical

Properties

• Ductility

#: Ref: R.J. Crawford, Rotational Moulding, Rapra Review Report, 71

BITS Pilani, K K Birla Goa Campus

Testing of Density

• Ref: ASTM D-792 or ISO 1183 method D.

BITS Pilani, K K Birla Goa Campus

T esting of Powder: Dry Flow and Bulk Density

Ref: Association of Rotational Molders, Test Method for Flowability and Apparent Density of Polyethylene Powders, Version 2.1 – November 2011, pp-2-8, ASTM 1895-69 with conditions redefined for use in rotational moulding

BITS Pilani, K K Birla Goa Campus

Melt Flow Index (MFI)

Schematic Dynisco MFI in Our Lab

Ref: ASTM D -1238

BITS Pilani, K K Birla Goa Campus

Effect of MFI on Different Properties #

MFI Property

• Flow Properties

e.g. Viscosity

• Impact Strength
• Tensile Strength
• ESCR
• Weatheribility
• Chemical

Resistance

• Ductility

#: Ref: R.J. Crawford, Rotational Moulding, Rapra Review Report, 71

BITS Pilani, K K Birla Goa Campus

ESCR

Ref: ASTM D-1693

BITS Pilani, K K Birla Goa Campus

T esting of T ensile Properties

UTM in Lab (Load Cell 0-10 KN) Typical Stress-Strain Plot

Ref: ASTM D 638

BITS Pilani, K K Birla Goa Campus

T esting of Flexural Properties

Schematic of Flexural Testing Lab Testing Set Up

Ref: ASTM D 790

BITS Pilani, K K Birla Goa Campus

Typical Flexural Curves

Ref: ASTM D 790

BITS Pilani, K K Birla Goa Campus

Schematic of Low T

• emp. Impact T

est

Ref: ARM Low Temperature Impact Test

BITS Pilani, K K Birla Goa Campus

HDT : Schematic and Set Up

Schematic of Flexural Testing Lab Set Up for HDT Ref: ASTM D 648

BITS Pilani, K K Birla Goa Campus

Geometry and Form T esting: Coordinate Measuring Machine (CMM)

Testing of product for Dimensions, Profile, Depth, Angularity, etc.

BITS Pilani, K K Birla Goa Campus

• Dynamic Mechanical Analyzer (DMA): TA Instruments

USA

• Differential Scanning Calorimetry (DSC).
• Thermo gravimetric Analysis (TGA)
• Scanning Electron Microscope
• Templogger
• Injection Moulding Machine: Ferromatic Millerkon -50 T
• Compression Moulding Press-32 T
• 3-D printer for Rapid Prototyping: Make Stratasys
• ROTOSIM.
• Pro-E, ANSYS and other CAE tools.

Other Facilities at BITS GOA ( will be replaced with Photos)

BITS Pilani, K K Birla Goa Campus

Test Standard Density ASTM D 1505/D-4883/D-792 or ISO 1183 method D. Dry Flow and Bulk Density ASTM 1895-69 with conditions redefined for use in rotational moulding MFI ASTM D -1238 ESCR ASTM D-1693 Tensile Strength and Modulus ASTM D 638 Type I to IV Flexural Strength and Modulus ASTM D 790 Low Temperature Dart Impact ARM International HDT ASTM D 648

Conclusion: Our Service Capabilities

BITS Pilani, K K Birla Goa Campus

“The best Research will give the best Teaching and the best Teaching will give the best Research” Dr. APJ Abdul Kalam.

Thanks